US1222366A - Hand-controlled safety-knife. - Google Patents

Hand-controlled safety-knife. Download PDF

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Publication number
US1222366A
US1222366A US9948016A US9948016A US1222366A US 1222366 A US1222366 A US 1222366A US 9948016 A US9948016 A US 9948016A US 9948016 A US9948016 A US 9948016A US 1222366 A US1222366 A US 1222366A
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United States
Prior art keywords
blade
guard
knife
hand
cutting edge
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US9948016A
Inventor
Malcolm Curry
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American Thread Co
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American Thread Co
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Publication date
Application filed by American Thread Co filed Critical American Thread Co
Priority to US9948016A priority Critical patent/US1222366A/en
Application granted granted Critical
Publication of US1222366A publication Critical patent/US1222366A/en
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B29/00—Guards or sheaths or guides for hand cutting tools; Arrangements for guiding hand cutting tools
    • B26B29/02—Guards or sheaths for knives

Definitions

  • My invention relates to hand-controlled safety knives, and has for its object to provide a knife having a guard for the cutting ⁇ edge, which can be easily controlled by the hand holdingl the knife so as to expose the cutting edge for use independently of the substance to be out.
  • Fig. 2 shows on an enlarged scale a section of the same on the line 2-2 Fig. 1.
  • Fig. 3 is a Side elevation of a modification.
  • Fig. ll is a longitudinal section of another modification embodying my invention.
  • Fig. 5 is a perspective view of the guard shown in Fig. l.
  • 1 is a handle. to which a knife blade 2 is rigidly connected, the cutting edge of said knife blade pointing upward.
  • 3 is a vguard composed of sheet metal bent so as to surround a portion of the back edge of the knife, as shown at et in Fig. 2.
  • the guard embraces both sides of the blade and is provided at a point adjacent to the handle with a portion 5 formed by bending over an extension on one side thereof and adapted to be engaged by 'the thumb of the hand holding the knife s0 that pressure thus applied thereto will move the guard so as to expose for use the end portion of the cutting edge of the blade independently of the substance to be cut by the blade.
  • the spring 6 is a spring, one end of which is connected to the handle, while the other end is soldered at 7 to the guard so as to yieldingly support the guard.
  • the spring is bent around a stud 8 on the blade so as to render its action more definite. Pressure of the thumb upon the portion 5 causesthe guard to move relatively to the blade so as to expose the Specification of Letters Patent.
  • Fig. 3 The construction shown in Fig. 3 is similail to that shown in Fig. 1 except that lthe guard is connected to the blade by a pivot 9 and the spring is not soldered to the guard. The result is substantially the same as in the construction of Fig. 1.
  • 1() is a handle, to which a blade 11 is Inovably connected at point 12 by a suitable rivet, the cutting edge of the blade pointing upward.
  • a projecting portion 13 Integral with the handle is a projecting portion 13, which constitutes a guard for the cutting edge of the blade. This guard extends over the back of the blade at the point 11, said portion 141 forming a limiting ⁇ stop limiting the relative movements of the parts at a point where the blade will be properly protected by the guard.
  • the rear portion of the guard is cut away along the dotted line 15, so that the thumb of the hand holding the knife can be applied to the rear edge of the blade at a point remote from both ends of the cutting edge in Such manner that pressure thereon will force the cutting blade out beyond the guard independently of the substance to be cut so as to expose it for use.
  • the blade is provided with a rearwardly extendingtang 1G, with which a spring 17 carried by the handle engages, which spring retracts the cutting edge of the blade to a position where it is protected by the guard and thus normally tends to hold the cutting edge in protected position.
  • the guard-member has an opening extending through the front portion thereof, and along the cutting edge of the blade-member to its point, the plane of said blade-member passing through said opening, and is movable to expose the cutting edge of said blade-member in front of said guard-member, and that said guardmember has a surface located in the plane of said blade-member, so as to be intersected thercby,-this portion of the guard-member being in proximity to the handle and projecting further in front of said edge than the portion of the guard-member adjacent to the point of said blade-member and adapted to receive pressure from the thumb of the hand holding the knife, to move said guardmember so that the cutting edge of the bla cle-member is exposed through the opening in the front of said guard-member.
  • a safety knife the combination of a .flat blade-member having a cutting edge along its front portion, a member constituting a guard therefor having an opening extending through the front thereof and along the cutting edge of said blade-member to its point, the plane of said blade-member passing through said opening, one of said members being movable to expose said cutting edge of said blade-member through said opening, an elongated handle adapted to be grasped by the hand and to Which the other of said members is rigidly connected, a spring for returning said movable member to normal position, said movable member having a surface remote from the end of said cutting edge which is farthest from the handle, and located in the plane'of said blade-member, for receiving pressure of the thumb of the hand holding said handle, to move said movable member from normal position, so that said cutting edge of said blade-member is exposed in front of said guard-member.
  • a safety knife the combination of an elongated handle adapted to be grasped by the hand, a blade-member projecting from one end thereof and rigidly connected thereto, the front edge of said blade-member having a cutting portion, a guard-member having an opening in the front portion thereof, said opening lying in the plane of said blade-member and extending to the point thereof, said guard-member being movable so as to expose the cutting portion of the front edge of said blade-member through said opening, a spring for returning said guard-member When so moved, the part of said guard-member in proximity to said handle projecting farther in front of said front edge than the part adjacent to the point of said blade-member, so as to have a surface for receiving the pressure of the thumb of the hand holding said handle to move said guard-member, so that the cutting edge of said blade-member projects through the opening in the front of said guardmember.
  • a safety knife the combination of an elongated handle adapted to be grasped by the hand, a blade-member projecting from one end thereof and rigidly connected thereto, the front edge of said blade-member having a cutting portion, a guard-member having an opening in the front portion thereof, said opening lying in the plane of said blade-member and extending to the point thereof, said guard-member being movable so as to expose the cutting portion of the front edge of said blade-member through' said opening, a spring for returning said guard-member when so moved, the part of said guard-member in proximity to said handle projecting farther in front of said front edge than the part adjacent to the point of said blade-member, and extending over said front edge so as to be intersected by the plane of said blade-member, so as to have a surface for receiving the pressure of the thumb of the hand holding saidy handle to move said guard-member, so that the cutting edge of said blade-member projects through the opening in the front of said guard-member.

Description

NI. CUHRY.
HAND CONTROLLED SAFETY KNIFE.
APPLxcATloN man HIM/24.1916.
132229866., l Patented Apr. 10,1917.
parra sans amari prima.
MALCOLM CURRY, OF HOLYOKE, MASSACHUSETTS, ASSIGNOR TO THE AMERICAN THREAD COMPANY, OIE' NEW YORK, N. Y., .A CORPORATION OF NEW JERSEY.
HAND-CONTROLLED SAFETY-KNIFE.
To all whom t may concern:
Be it known that I, MALCOLM CURRY, a citizen ol .the United States, residing at Holyoke, county of Hampden, State of hilassachusetts, have invented a certain new and useful Invention Relating to Hand- Controlled Safety-Knives, of whichv the following is a full, clear, and exact description.
My invention relates to hand-controlled safety knives, and has for its object to provide a knife having a guard for the cutting` edge, which can be easily controlled by the hand holdingl the knife so as to expose the cutting edge for use independently of the substance to be out.
The following is a description of an embodiment of my invention, reference being had to the accompanyingdrawings, in which- Figure 1 shows in side elevation a knife embodying my invention.
Fig. 2 shows on an enlarged scale a section of the same on the line 2-2 Fig. 1.
Fig. 3 is a Side elevation of a modification.
Fig. ll is a longitudinal section of another modification embodying my invention.
Fig. 5 is a perspective view of the guard shown in Fig. l.
Referring more particularly to the drawings, 1 is a handle. to which a knife blade 2 is rigidly connected, the cutting edge of said knife blade pointing upward. 3 is a vguard composed of sheet metal bent so as to surround a portion of the back edge of the knife, as shown at et in Fig. 2. The guard embraces both sides of the blade and is provided at a point adjacent to the handle with a portion 5 formed by bending over an extension on one side thereof and adapted to be engaged by 'the thumb of the hand holding the knife s0 that pressure thus applied thereto will move the guard so as to expose for use the end portion of the cutting edge of the blade independently of the substance to be cut by the blade. 6 is a spring, one end of which is connected to the handle, while the other end is soldered at 7 to the guard so as to yieldingly support the guard. The spring is bent around a stud 8 on the blade so as to render its action more definite. Pressure of the thumb upon the portion 5 causesthe guard to move relatively to the blade so as to expose the Specification of Letters Patent.
Application led May 24, 1916.
Fai-vented Apr. 10, 1917.
Serial No. 99,480.
end cutting portion of the blade substantially as shown in Fig. 3. When the pressure is released the spring returns the guard to its normal cutting-edge-protecting position. The inner surface of the portion 41 of the guard engages the back of the blade when the guard is in normal position, the surface of the back of the blade and said inner surface at that point constituting limiting stop surfaces for limiting the relative movements of the parts under the action of' the spring 6.
The construction shown in Fig. 3 is similail to that shown in Fig. 1 except that lthe guard is connected to the blade by a pivot 9 and the spring is not soldered to the guard. The result is substantially the same as in the construction of Fig. 1.
In the construction shown in Fig. et, 1() is a handle, to which a blade 11 is Inovably connected at point 12 by a suitable rivet, the cutting edge of the blade pointing upward. Integral with the handle is a projecting portion 13, which constitutes a guard for the cutting edge of the blade. This guard extends over the back of the blade at the point 11, said portion 141 forming a limiting` stop limiting the relative movements of the parts at a point where the blade will be properly protected by the guard. The rear portion of the guard is cut away along the dotted line 15, so that the thumb of the hand holding the knife can be applied to the rear edge of the blade at a point remote from both ends of the cutting edge in Such manner that pressure thereon will force the cutting blade out beyond the guard independently of the substance to be cut so as to expose it for use. The blade is provided with a rearwardly extendingtang 1G, with which a spring 17 carried by the handle engages, which spring retracts the cutting edge of the blade to a position where it is protected by the guard and thus normally tends to hold the cutting edge in protected position.
It will be seen from the foregoing that in Figs. 1 and 2 the guard-member has an opening extending through the front portion thereof, and along the cutting edge of the blade-member to its point, the plane of said blade-member passing through said opening, and is movable to expose the cutting edge of said blade-member in front of said guard-member, and that said guardmember has a surface located in the plane of said blade-member, so as to be intersected thercby,-this portion of the guard-member being in proximity to the handle and projecting further in front of said edge than the portion of the guard-member adjacent to the point of said blade-member and adapted to receive pressure from the thumb of the hand holding the knife, to move said guardmember so that the cutting edge of the bla cle-member is exposed through the opening in the front of said guard-member.
its will be evident to those skilled in the art, my invention permits of various modifications without departing from the spirit thereof or the scope of the appended claims.
lhat I claim is:
1. In a safety knife the combination of a .flat blade-member having a cutting edge along its front portion, a member constituting a guard therefor having an opening extending through the front thereof and along the cutting edge of said blade-member to its point, the plane of said blade-member passing through said opening, one of said members being movable to expose said cutting edge of said blade-member through said opening, an elongated handle adapted to be grasped by the hand and to Which the other of said members is rigidly connected, a spring for returning said movable member to normal position, said movable member having a surface remote from the end of said cutting edge which is farthest from the handle, and located in the plane'of said blade-member, for receiving pressure of the thumb of the hand holding said handle, to move said movable member from normal position, so that said cutting edge of said blade-member is exposed in front of said guard-member.
2. In a. safety knife the combination of an elongated handle adapted to be grasped by the hand, a blade-member projecting from one end thereof and rigidly connected thereto, the front edge of said blade-member having a cutting portion, a guard-member having an opening in the front portion thereof, said opening lying in the plane of said blade-member and extending to the point thereof, said guard-member being movable so as to expose the cutting portion of the front edge of said blade-member through said opening, a spring for returning said guard-member When so moved, the part of said guard-member in proximity to said handle projecting farther in front of said front edge than the part adjacent to the point of said blade-member, so as to have a surface for receiving the pressure of the thumb of the hand holding said handle to move said guard-member, so that the cutting edge of said blade-member projects through the opening in the front of said guardmember.
8. In a safety knife the combination of an elongated handle adapted to be grasped by the hand, a blade-member projecting from one end thereof and rigidly connected thereto, the front edge of said blade-member having a cutting portion, a guard-member having an opening in the front portion thereof, said opening lying in the plane of said blade-member and extending to the point thereof, said guard-member being movable so as to expose the cutting portion of the front edge of said blade-member through' said opening, a spring for returning said guard-member when so moved, the part of said guard-member in proximity to said handle projecting farther in front of said front edge than the part adjacent to the point of said blade-member, and extending over said front edge so as to be intersected by the plane of said blade-member, so as to have a surface for receiving the pressure of the thumb of the hand holding saidy handle to move said guard-member, so that the cutting edge of said blade-member projects through the opening in the front of said guard-member.
MALCOLM CURRY.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.
US9948016A 1916-05-24 1916-05-24 Hand-controlled safety-knife. Expired - Lifetime US1222366A (en)

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2471334A (en) * 1947-10-20 1949-05-24 Henry H Levin Paper cutter
US2945298A (en) * 1955-08-03 1960-07-19 Lenslite Co Inc Power operated cutting device
US3590483A (en) * 1968-06-24 1971-07-06 Harry Szczepanski Shielded knife
US5843107A (en) * 1996-03-21 1998-12-01 Landis; Robert M. Guard for the blade of a knife
US6381855B1 (en) * 2001-04-20 2002-05-07 Ching-Hsiung Lin Knife-holding assist
US20020188309A1 (en) * 2001-05-09 2002-12-12 Mark Adelman Scalpel blade guard
US6493946B1 (en) * 2000-05-26 2002-12-17 Carl L. Carrillo Knife guard
US20090139096A1 (en) * 2007-12-04 2009-06-04 Brian William Hayes Double Handle Kitchen Knife
US20090142463A1 (en) * 2007-12-04 2009-06-04 Brian William Hayes Double Handle Kitchen Knife
US20090139097A1 (en) * 2007-12-04 2009-06-04 Brian William Hayes Double Handle Kitchen Knife
US20090223066A1 (en) * 2002-11-19 2009-09-10 Earl J. Votolato Safety cutting apparatus
US20090229132A1 (en) * 2007-12-04 2009-09-17 Brian William Hayes Double Handle Kitchen Knife
US20120210584A1 (en) * 2011-02-18 2012-08-23 Logan Samuel C Shielded knife and associated methods
USD811854S1 (en) * 2016-09-20 2018-03-06 Jason Maurer Knife guide
US20180133908A1 (en) * 2016-11-17 2018-05-17 Goodrich Corporation Safety knife with retractable sheath
US11780107B1 (en) * 2022-11-17 2023-10-10 Rayan Omidi Movable knife blade cover

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2471334A (en) * 1947-10-20 1949-05-24 Henry H Levin Paper cutter
US2945298A (en) * 1955-08-03 1960-07-19 Lenslite Co Inc Power operated cutting device
US3590483A (en) * 1968-06-24 1971-07-06 Harry Szczepanski Shielded knife
US5843107A (en) * 1996-03-21 1998-12-01 Landis; Robert M. Guard for the blade of a knife
US6493946B1 (en) * 2000-05-26 2002-12-17 Carl L. Carrillo Knife guard
US6381855B1 (en) * 2001-04-20 2002-05-07 Ching-Hsiung Lin Knife-holding assist
US20020188309A1 (en) * 2001-05-09 2002-12-12 Mark Adelman Scalpel blade guard
US7485126B2 (en) * 2001-05-09 2009-02-03 New York University Scalpel blade guard
US8209870B2 (en) * 2002-11-19 2012-07-03 Earl Votolato Safety cutting apparatus
US7886443B2 (en) * 2002-11-19 2011-02-15 Earl Votolato Safety cutting apparatus
US20100236076A1 (en) * 2002-11-19 2010-09-23 Earl Votolato Safety cutting apparatus
US20090223066A1 (en) * 2002-11-19 2009-09-10 Earl J. Votolato Safety cutting apparatus
US20090229132A1 (en) * 2007-12-04 2009-09-17 Brian William Hayes Double Handle Kitchen Knife
US7726030B2 (en) * 2007-12-04 2010-06-01 Brian William Hayes Double handle kitchen knife
US20090139097A1 (en) * 2007-12-04 2009-06-04 Brian William Hayes Double Handle Kitchen Knife
US20090142463A1 (en) * 2007-12-04 2009-06-04 Brian William Hayes Double Handle Kitchen Knife
US8082669B2 (en) 2007-12-04 2011-12-27 Brian William Hayes Double handle kitchen knife
US20090139096A1 (en) * 2007-12-04 2009-06-04 Brian William Hayes Double Handle Kitchen Knife
US20120210584A1 (en) * 2011-02-18 2012-08-23 Logan Samuel C Shielded knife and associated methods
US8677629B2 (en) * 2011-02-18 2014-03-25 Samuel C. Logan Shielded knife and associated methods
USD811854S1 (en) * 2016-09-20 2018-03-06 Jason Maurer Knife guide
US20180133908A1 (en) * 2016-11-17 2018-05-17 Goodrich Corporation Safety knife with retractable sheath
US10207414B2 (en) * 2016-11-17 2019-02-19 Goodrich Corporation Safety knife with retractable sheath
US11780107B1 (en) * 2022-11-17 2023-10-10 Rayan Omidi Movable knife blade cover

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